[SRU][N][PATCH v3 0/2] System hang when running memory/memory_stress_ng test

[En-Wei Wu]

BugLink: https://bugs.launchpad.net/bugs/2085092

[Impact]
memory/memory_stress_ng test failed when swapping due to the ASPM issue with VMD device.

[Fix]
Backport the two patches from linux-next fixes the issue:

d66041063192 PCI: vmd: Set devices to D0 before enabling PM L1 Substates
e1714f3b1f4d PCI/ASPM: Add notes about enabling PCI-PM L1SS to pci_enable_link_state(_locked)

[Test Plan]
1. Boot up Ubuntu OS
2. $ checkbox-cli run com.canonical.certification::stress/store_and_change_oomd_config
3. $ checkbox-cli run com.canonical.certification::memory/memory_stress_ng

[Where problems could occur]
May cause ASPM regression.

Jian-Hong Pan (2):
  PCI: vmd: Set devices to D0 before enabling PM L1 Substates
  PCI/ASPM: Add notes about enabling PCI-PM L1SS to
    pci_enable_link_state(_locked)

 drivers/pci/controller/vmd.c | 11 +++++++++--
 drivers/pci/pcie/aspm.c      |  6 ++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

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2.43.0